Heaton park is my local parkrun so have run around it many times. Have done a 10k here before and it was nice that run through have now added a half marathon to the days running.
The start is staggered to let the half marathon group get around the bit they do differentely before the 5 and 10k groups set off. Heaton is notorious for a couple of its hills, the long slog up from the golf course up to the manor house is really tough. Be warned you have to do it multiple times.
As it is in a park it felt more like a training run with other people, there are not too many people out supporting. Nice event though and good to get my legs going for the distance.